Pneumatic tensioning wheel device

Abstract

The invention discloses a pneumatic tensioning wheel device. The pneumatic tensioning wheel device comprises a barrel-shaped shell body, a core shaft is fixedly arranged on the bottom wall of the cavity of the shell body, and a tensioning arm rotationally sleeves the core shaft; the tensioning arm comprises a horizontal swing arm, a top mounting table and a bottom mounting table, wherein the tensioning arm rotationally sleeves the core shaft through the bottom mounting table, a tensioning wheel rotationally sleeves the top mounting table of the tensioning arm, and an annular groove is formed in the bottom mounting table of the tensioning arm; annular damping arranged up and down and a compensation spring stayed in a compression state are arranged in the annular groove, the cross section ofthe annular damping is triangular, a pressing cover is arranged at the top end of the core shaft, and the core shaft tight press the annular damping on the compensation spring through the pressing cover; and an air cylinder is further arranged in the cavity of the shell body, an arc-shaped air cavity is formed in the air cylinder, and an arc-shaped piston rod is arranged in the arc-shaped air cavity of the air cylinder, the outer end of the piston rod extends out of the air cylinder and is fixedly connected with the bottom mounting table of the tensioning arm. The pneumatic tensioning wheel device has the advantages of being safe and reliable; and the working state is capable of being monitored and maintenance is not needed.

Description

technical field [0001] The invention relates to a pneumatic tension wheel device. Background technique [0002] Belt automatic tensioner, in the transmission system, plays the role of tensioning the belt, preventing the belt from slipping, and reducing system vibration. [0003] In the prior art, a spring is usually used as the return mechanism of the tensioner, the damping is usually square, and the bottom of the mandrel is flush with the bottom of the housing. Prior art has following defective: [0004] 1. The spring is used as the return mechanism of the tensioner. It is difficult to monitor the tension force, and it is impossible to find the abnormal tension force at the first time. If the tension force is too large, the belt may wear abnormally, and if the tension force is too small, it may cause Belt slippage, wear, toothed belt skipping teeth, reduction in transmission efficiency, etc. [0005] 2. After the square damper is gradually worn out during use, the gap be...

AI Technical Summary

Problems solved by technology

[0004] 1. Using the spring as the return mechanism of the tensioner, it is difficult to monitor the tension force, and it is impossible to find the abnormal tension force at the first time. Excessive tension force may cause abnormal wear of the belt, and too small tension force may cause Belt slipping, wear, toothed belt jumping, reduction in transmission efficiency, etc.

[0005] 2. After the square damper is gradually worn out during use, the gap with the cover plate will gradually increase, which will reduce the shock absorption capacity of the tensioner, increase the vibration amplitude, and reduce the durability

[0006] 3. The bottom of the mandrel and the bottom of the shell in the existing scheme are usually flush. If the mandrel contacts the mounting surface during the tightening of the mounting bolts, false torque may be caused, that is, the shell is not pressed tightly, and the pressing force is reduced. , causing the mounting bolts to loosen during use

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